We must specify the model further before we can study its phenomenology. In
particular, the \(V_I\)  mixing matrices deserve our attention. With simplicity, ease of passing
flavour bounds and
the ability to explain the neutral current \(b \rightarrow s \mu ^+ \mu ^-\)  anomalies as guiding
principles, an example set of mixing
matrices \( V_{I} \)  was proposed in ref. [1]}:
\(V_{d_L} = \begin{pmatrix}1 & 0 & 0 \\0 & \cos \theta _{sb} & - \sin \theta _{sb}\\0 & \sin \theta _{sb}& \cos \theta _{sb} \\\end{pmatrix},\) 
